Unsaturated polyester resin modified with poly(organosiloxanes). I. Preparation, dynamic mechanical properties, and impact resistance

2001 ◽  
Vol 81 (13) ◽  
pp. 3272-3279 ◽  
Author(s):  
Val�ria M. Rosa ◽  
Maria Isabel Felisberti
Keyword(s):  
Mechanical Properties ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Impact Resistance ◽  
Dynamic Mechanical Properties ◽  
Unsaturated Polyester Resin ◽  
Dynamic Mechanical

Toughening Studies of an Unsaturated Polyester Resin Using Maleated Elastomers

2001 ◽  
Vol 17 (4) ◽  
pp. 205-224 ◽  
Author(s):  
A. Benny Cherian ◽  
Eby Thomas Thachil
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Impact Resistance ◽  
Physical Method ◽  
Unsaturated Polyester Resin ◽  
Polyester Resins ◽  
Reinforced Plastic ◽  
Physical And Chemical

Unsaturated polyester resins are extensively used in the fibre-reinforced plastic industry. The fracture toughness and impact resistance of rigid unsaturated polyester can be improved by the incorporation of elastomers by physical and chemical methods. In the physical method, two strategies are adopted. In the first, various masticated elastomers are dissolved in styrene and blended with unsaturated polyester resin. In this study, the mechanical properties of cured blends are compared with the unmodified resin and the performance of nitrile rubber is found to be far superior to all other rubbers considered. In the second approach, elastomers are modified by grafting with maleic anhydride. These maleated elastomers are then dissolved in styrene and blended with polyester resin. Maleic anhydride modified elastomers are found to improve the mechanical properties such as toughness, impact resistance and tensile strength of the cured resin to a greater extent compared to unmodified elastomers.

Physical and mechanical properties of unsaturated polyester resin matrix from recycled PET (based PG ) with corn straw fiber

2021 ◽  
pp. 51305
Author(s):  
Nora Abigail Wilson García ◽  
Jorge Luis Almaral Sánchez ◽  
Ramón Álvaro Vargas Ortiz ◽  
Abel Hurtado Macías ◽  
Nelly Flores Ramírez ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Physical And Mechanical Properties ◽  
Unsaturated Polyester Resin ◽  
Resin Matrix ◽  
Corn Straw ◽  
Recycled Pet

Reuse potential of functionalized thermoplastic waste as reinforcement for thermoset polymers: Mechanical properties and erosion resistance

2021 ◽  
pp. 002199832110370
Author(s):  
Tihomir Kovačević ◽  
Saša Brzić ◽  
Melina Kalagasidis Krušić ◽  
Jovica Nešić ◽  
Ljubica Radović ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Activation Energy ◽  
Erosion Resistance ◽  
Unsaturated Polyester ◽  
Chemical Activation ◽  
Mining Industry ◽  
Dynamic Mechanical Properties ◽  
Variable Loading ◽  
Polymer Waste ◽  
Dynamic Mechanical

Two types of polymer waste materials, poly(ethylene terephthalate) (PET) and polycarbonate based Colombian Resin (CR-39), were used for the designing of fully recycled composite materials. Waste PET was employed for the synthesis of thermoset unsaturated polyester resin (UPR), while CR-39 was used as reinforcement in the UPR matrix. Prior to mixing, CR-39 particles were subjected to oxidation and chemical activation using acids/base and ethanol amine, respectively. The effect of the modifier type and variable loading of the activated CR-39 particles on mechanical and dynamic-mechanical properties of the corresponding composites was investigated. The greatest improvement in the tensile and flexural strength of UPR resin was achieved with the composite containing 0.5 wt% of amine activated filler particles, 96.0% and 62.2%, respectively. The Arrhenius equation was used to calculate the activation energy for glass transition from dynamic mechanical properties measured at various frequencies. The activation energy of the main transition for UPR resin and composites were calculated to be 173 and 350 kJ·mol−1 indicating that reinforcement results in an increase in the energy barrier to macromolecules viscoelastic relaxation. In addition, erosion resistance was studied during exposure of samples to cavitation tests. According to the obtained results, these materials can be applied in construction and mining industry.

Fabrication and Characterization of E-Glass Fiber Reinforced Unsaturated Polyester Resin Based Composite Materials

2019 ◽  
Vol 24 ◽  
pp. 1-7
Author(s):  
Md. Naimul Islam ◽  
Harun Ar-Rashid ◽  
Farhana Islam ◽  
Nanda Karmaker ◽  
Farjana A. Koly ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Bending Strength ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Glass Fibers ◽  
Tensile Modulus ◽  
Unsaturated Polyester Resin ◽  
Fiber Reinforced ◽  
Bending Modulus

E-glass fiber mat reinforced Unsaturated Polyester Resin (UPR)-based composites were fabricated by conventional hand lay-up technique. The fiber content was varied from 5 to 50% by weight. Mechanical properties (tensile and bending) of the fabricated composites were investigated. The tensile strength (TS) of the 5% and 50% fiber reinforced composites was 32 MPa and 72 MPa, respectively. Similarly, tensile modulus, bending strength and bending modulus of the composites were increased by the increase of fiber loading. Interfacial properties of the composites were investigated by scanning electron microscopy (SEM) and the results revealed that the interfacial bond between fiber and matrix was excellent. Keywords: Unsaturated Polyester Resin, Mechanical Properties, E-glass Fibers, Composites, Polymer.

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